<!DOCTYPE html>
<html>
<head>
    <meta charset='utf-8'>
    <meta http-equiv='X-UA-Compatible' content='IE=edge'>
    <title>Page Title</title>
    <meta name='viewport' content='width=device-width, initial-scale=1'>
    <link rel='stylesheet' type='text/css' media='screen' href='main.css'>
    <script src='main.js'></script>
</head>
<style>
.phone {
    width: 80px;
    height: 80px;
    background: url(../css-材料包/img/sprite_right.png);
    background-position: 0 -270px;
}
.phone:hover {
    background-position: -270px 0;
}
</style>
<body style="background-color: grey;">
    <div class="phone"></div>
</body>
</html>